{
  "id": "1010.5870",
  "version": "v1",
  "published": "2010-10-28T06:50:27.000Z",
  "updated": "2010-10-28T06:50:27.000Z",
  "title": "Population study for gamma-ray pulsars with the outer gap model",
  "authors": [
    "J. Takata",
    "Y. Wang",
    "K. S. Cheng"
  ],
  "comment": "45 page, 10 figures, Accepted for publication in ApJ",
  "categories": [
    "astro-ph.HE"
  ],
  "abstract": "Inspired by increase of population of $\\gamma$-ray emitting pulsars by the $Fermi$ telescope, we perform a population study for $\\gamma$-ray emitting canonical pulsars. We use a Monte-Carlo technique to simulate the Galactic population of neutron stars and the radio pulsars. For each simulated neutron star, we consider the $\\gamma$-ray emission from the outer gap accelerator in the magnetosphere. In our outer gap model, we apply the gap closure mechanism proposed by Takata et al., in which both photon-photon pair-creation and magnetic pair-creation processes are considered. Simulating the sensitivities of previous major radio surveys, our simulation predicts that there are $\\sim 18-23$ radio loud and $\\sim 26-34$ $\\gamma$-ray-selected $\\gamma$-ray pulsars, which can be detected with a $\\gamma$-ray flux $F_{\\gamma}\\ge 10^{-10}~\\mathrm{erg/cm^2 s}$. Applying the sensitivity of the six-month observation of the $Fermi$ telescope, 40-61 radio-selected and 36-75 $\\gamma$-ray selected pulsars are detected within our simulation. We show that the distributions of various pulsar parameters for the simulated $\\gamma$-ray pulsars can be consistent with the observed distribution of the $\\gamma$-ray pulsars detected by the $Fermi$ telescope. We also predict that $\\sim 64$ radio-loud and $\\sim 340$ $\\gamma$-ray-selected pulsars irradiate the Earth with a flux $F_{\\gamma}\\ge 10^{-11}~\\mathrm{erg/cm^2 s}$, and most of those $\\gamma$-ray pulsars are distributing with a distance more than 1~kpc and a flux $F_{\\gamma}\\sim 10^{-11}~\\mathrm{erg/cm^2 s}$. The ration between the radio-selected and $\\gamma$-ray-selected pulsars depend on the sensitivity of the radio surveys. We also discuss the Galactic distribution of the unidentified $Fermi$ sources and the canonical $\\gamma$-ray pulsars.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2010-10-28T06:50:27.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "outer gap model",
      "population study",
      "gamma-ray pulsars",
      "radio surveys",
      "neutron star"
    ],
    "tags": [
      "journal article"
    ],
    "publication": {
      "doi": "10.1088/0004-637X/726/1/44",
      "journal": "The Astrophysical Journal",
      "year": 2011,
      "month": "Jan",
      "volume": 726,
      "number": 1,
      "pages": 44
    },
    "note": {
      "typesetting": "TeX",
      "pages": 45,
      "language": "en",
      "license": "arXiv",
      "status": "editable",
      "inspire": 874779,
      "adsabs": "2011ApJ...726...44T"
    }
  }
}